[長知識] C語言 - 新手篇章 - 遞迴三

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int sum(int s, int e){
//遞增，s是定值
if(s==e){
return e;
}else{

// 2 ->3 ->4 ->5
return sum(s+1, e)+s;
}

}


int main(int argc, char *argv[]) {
int start, end;
printf("輸入start:");
scanf("%i", &start);

printf("輸入end:");
scanf("%i", &end);

printf("%i", sum(start, end) );

return 0;

return 0;
}